Ya, born in Colombia but plays for USA, he is a free agent in the summer anyway so the Celtic FO maybe thought it better to wait and see if they could sign him on the free instead of the hefty 5 or so million MLS wants for him. He is very good and definitely a future star his only issue seems to be actually getting on the field, he has had trouble with minor injuries keeping him out for what seems like every other month. Here is probably his best goal so far: http://www.youtube.com/watch?v=EWbpyv638Bg